Rewinding device for selector-sheets.



F. W. HEMPELMANN.

EEWINDING DEVICE FOR SELECTOR SHEETS.

APPLICATION FILED FEB. 12, 1913.

Patented Mayv 19, 1914.

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Making/j 2 SHEETS-SHEET 1.

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F. W. HEMPELMANN.-

EEWINDING DEVICE EOE SELECTOR SHEETS. APPLIGATION FILED FEB. 12. 1913.

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2 SHEETS-SHEET 2.

WITNESSES: JNVENTOR.

25 2, this view being somewhat enlarged.

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UNITED STATES PATENT OFFICE.

FREDERICK W. HEMPELMANN, OF CINCINNATI, OHIO.

REWINDINGvDEVICE FOR SELECTOR-SHEETS.

Specification of Letters Patent.

Patented May 19, J 914.

Original application led May 22, 1912, Serial No. 698,875. Divided and this application filed February 12,V 1913. Serial No. 747,892.

To all tlf/0m it may concern Be it known that I, FREDERICK W. HEM- rnLMnNN, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Rewinding Devices for Selector Sheets, of which the following is a specilication.

My invention relates to automatic musical instruments, and has for its object the regular and accurate operation of the selector sheet of the instrument, while at the same time permitting ready removal and insertion of the selector sheet.

The invention consists in the parts and in the details of construction and arrangement of parts, as will hereinafter be mo-re fully described and claimed.

In the drawings: Figure 1 is a front elevation of a device embodying my invention. Fig'. -2 is a vertical cross section, looking tothe right, on a line corresponding to the line -x of Fig. 1. Fig. 3 is a partial longitudinal vertical section, on a line corresponding to the line y-g/ of Fig.

In the device here exemplifying my invention, the perforated sheet 1 is wound from the upper spool 2 onto the lower spool 3 during the-rendition of the music, passing over the tracker board 4, which has a series of orifices t, through which air is admitted when the` corresponding perforations 1 of the sheet pass over them. Through these orifices the air acts, by means of suitable mechanism, `upon the instrument, in any of a number of ways familiar to those skilled in the art of constructing self-playing musical instruments. When the playing of the piece of music is completed, the sheet is rewound onto the upper spool, for repetition, or for removal of the spool with the sheet, ready for the insertion of another spool with a different sheet or selector, to playa different piece of music. i

A suitable driving mechanism 5, and preferably, a pneumatically operated automatic reversing mechanism 6, are provided, both of which are fully described in my Patent No. 1,055,276, dated March 4, 1913, of the application for which this application is a division; and in another division of the above named application, Serial No; 747,893, filed Feb. 12, 1913. The connection of these mechanisms with the spools will be described later.

As shown, the spools 2 and 3 are supported in a frame da which also supports the tracker-board 4. The lower spool 3 is simply mounted at one end on a yieldable bearing 3, allowing it to be inserted in the frame, and makes engagement at the other or driving end with a main arbor 7, journaled'in a bearing 7 in a plate 7 that is fastened to the outside of the frame 4a, said bearing projecting through the frame at this point.

The upper spool 2 is mounted at one end on a yieldable bearing 2, and at its driving end on a re-winding arbor 8, likewise journaled in a. bearing 8 in the plate 7 projecting inside the frame 7 The mounting of the upper spool is illustrated in detail 'n Fig. 3, and the mounting of the lower spool may be understood from the description of this upper mounting, especially with reference to the yieldable bearing.

This yieldable bearing comprises a plunger 2a which receives the spindle 2 of the spool 2 and compresses a spring 2a in a casing 2b around its stem 2a that extends through the rear end of the casing and has a knob 23' for taking hold to manipulate the bearing during insertion of the spool as may well be understood from inspection of the drawing. VThe lower yieldable bearing is identical with the upper one, having, as may be seen in Fig. 1, a plunger 3L receiving the spindle 3 of the spool 8, and having a casing 3b from which the stem 3a protrudes with the knob 321' thereon.

The upper driving-end mounting is different from the lower driving-end mounting chiefly in that the upper one is adjustable so that the upper spool may be accurately alined with the lower spool. Thus, the re-winding' arbor- 8 is hollow throughout and has its bore somewhat enlarged at one end, to receive the forward spindle 2 of the spool 2. A diametral slot 8 crosses this enlarged spindle-receiving part of the bore, opening from this end of the shaft, and receives diametrically extended lugs 2 on the spindle. The slot 8 enough to allow enough movement of the lugs 2 therein to provide the desired adjustment of the upper spool with respect to the lower one. The re-winding arbor S has another enlargement to its bore at its other end, and this is threaded and receives an enlarged threaded part of a pin 8a that IOO is long extends its unenlarged part through the unenlarged part of the bore in the arbor, andY engages its end with the end ot the spindle 2 of the spool Q. The outer end of this pin 8a has a knob 8f", and by turning the pin to screw it in or out, the spool 2 will move loi'igitudinally, against or with the pressure of the spring 2a in the yieldable bearing. Vlhe lower main arbor 7 receives the spindle 3" oit the lower spool 3 in the manner above described.y but there is no pin for adjusting the spool 3.

lt will be seen that with the above-described mountings the spools will be rotated with their respective arbors, but may be removed and like spools with different perlorated sheets or selecto-rs inserted, which a requirement peculiar to self-playing musical instruments generally in use.

lly having the longitudinal adjustment et the upper spool, the spools may be readily alined, and avoid buckling and undue strain on any one part of the perforated sheet, while keeping it close to the tracker board at all times.

For driving the sheet in its downward travel, to play the music, the main arbor 7 has a spur gear 9 fixed to it outside the bearing 7 and for re-winding the sheet, the re-winding arbor 8 has a spur' gear 10 lined to it outside the bearing 8. Collars 7 and 8', inside the bearings, prevent end play ot the arbors 7 and 8, respectively.

rl`he gear 10 has a sheave 102L turning with it, and a shoe 10b bears on this sheave during the downward travel of the sheet, to prevent racing ot the upper spool. liat spring 7a bears on the gear 9, below, to similarly control the lower spool during re-winding. rEllis flat spring is allowed to bear constantly, but the shoe 10b, above, is controlled so as to be released from engagement with the sheave 10EL during the rewinding, by engagement of a pin 10C, mounted on the reversing mechanism. rllhis reversing mechanism comprises a slidable bracket 11, carrying pinions 12 and 13, which may mesh wit-h the spur gear 9 and pinion 10, below and above, respectively, alternatively. The operation of the driving mechanism 5 is such that the intermeshing of the pinion 12 and gear 9 will wind the sheet for playing, and the intermeshing of the pinion 13 and pinion 1() will rewind the sheet. The bracket 11 has an arm 11, entering a stirrup 14': on a bar 15, which is i sed or lowered by a sliding cam 16, connected to the pneumatic reversing` mechanism 6 by the strut 17. This mechanism is connected by tubes 6a to suitable apertures in the tracker board il, and the sheet has corresponding` perforations, such as the perforation 6', which, admitting air, causes the pneumatic mechanism 6 to act.

Springs 11 are interposed, inside the stirrup 14, between its upper and lower' insides and the adjacent sides of the arm 11a, to cushion the impact oi the teeth of the respective gears and pinions, as they intermesh.

The spiral cam 1S, driven by a worm 19 and worm gear 20 from the arbor 7, controls, through the bell-crank 21, the speed ot' winding of the sheet on the lower spool 3, by sliding the wheel 22 across the tace ot the disk Q3, of the driving mechanism 5, This wheel Q2 connects to the lower pinion 12 by means of the articulated shaft 24e, and the other pinion 13 connects to other parts of the driving` mechanism through the articulated shaft 25,

By means of the above described construction, the reversible driving mechanism is mounted tor positive action, and for accurate control thereof, while the spools are readily removable and adjustable, but under accurate control of the reversible driving mechanism at all times while in place for operation. ylhe entire driving mechanism is rendered independent of the trame lla, by having the immediate parts of the mechanism all mounted on the single plate 7, which may be of metal, while the trame la may be of wood, as is desirable in constructing this part of an automatic musical instrument.

Havin g fully described my invention, what l desire to secure by Letters Patent is:

1. In a re-winding device, in combination with a pertoratedselector sheet and a trackerboard over which the sheet travels, a frame supporting the tracker board, a main spool, a rewinding spool, a main arbor for the main spool, a re-winding arbor for the re-winding spool, means for the engagement and disengagement of the spools with their respective arbors, one of said arbors having a central bore, and a pin screwed into said arbor through said bore, engaging to adjust said re-winding spool axially, to aline said selector sheet.

2. ln a rewinding device, in combination with a perforated selector sheet and a tracker board over which the sheet travels, a frame supporting the tracker board, yieldable bearings in the frame, spools carrying the sheet and turning in the yieldable bearings, arbors for the spools journaled in the trame, means for engagement and disengagement of said spools with their respective arbors as permitted by their yieldable bearings, and whereby said spools are rotated by said arbors, one of said a bors having a central bore, and a pin screwed into said arbor through said bore, engaging to adjust said re-winding spool axially, to aline said selector sheet.

3. ln a re-winding device, in combination with a perforated selector sheet and a tracker board over which the sheet travels, a trame supporting the tracker board, spools carrying the sheet, yieldable bearings for the spools in the frame, a plate on the frame, arbors, and bearings for the arbors in the plate, means for engagement and disengagement of said spools with their respective arbors as permitted by their yieldable bearings, and whereby said spools are rotated by said arbors, toothed Wheels turning with the arbors, a slidable bracket on said plate, and toothed Wheels rota-table on the bracket, and intermeshed alternatively With respective ones of the toothed Wheels on the arbors, as the bracket slides on the plate, for the'purposes set forth.

4. In a re-vvinding device, in combination with a perforated selector sheet and a tracker board over Which the sheet travels, a frame supporting the tracker board, spools carrying the sheet, yieldable bearings for the spools in the fra-Ine, a plate on the frame, arbors, and bearings for the arbors in the plate, means for engagement and disengagement of said spoolsI with their respective arbors as permitted by their yieldable bearings, and whereby said spools are rotated by said arbors, toothed Wheels turning with the arbors, a slidable bracket on said plate, and toothed Wheels rotatable on the bracket, and internieshed alternatively with respective ones of the toothed Wheels on the arbors, as the bracket slides on the plate, a sheave turning with one of the arbors, a brake engaging the sheave, and means on said bracket to clisengage the brake from the sheave When the respective toothed Wheel on the bracket is ineshed With the toothed Wheel on the arbor having the sheave, for the purposes set forth.

FREDERICK W. HEMPELMANN. lVitnesses E. C. SAUNDERS, F. N. CARTER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

